EDL: Difference between revisions
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==Equal divisions of length== | ==Equal divisions of length== | ||
For an intervallic system with n divisions, [ | For an intervallic system with n divisions, [https://sites.google.com/site/240edo/equaldivisionsoflength%28edl%29 EDL] is considered as equal divisions of length by dividing string length to '''n''' equal divisions (so, we have '''n/2''' divisions per octave). If the first division is '''L1''' and the last, '''Ln''', we have: | ||
:: L1 = L2 = L3 = ... = Ln | :: L1 = L2 = L3 = ... = Ln | ||
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==Relation between Utonality and EDL system== | ==Relation between Utonality and EDL system== | ||
We can consider EDL system as [ | We can consider EDL system as [https://en.wikipedia.org/wiki/Otonal Utonal system]. '''Utonality''' is a term introduced by [https://en.wikipedia.org/wiki/Harry_Partch Harry Partch] to describe chords whose notes are the "undertones" (divisors) of a given fixed tone. | ||
In the other hand, a utonality is a collection of pitches which can be expressed in ratios that have the same numerators. For example, 7/4, 7/5, 7/6 form an utonality which 7 as numerator is called "[http://tonalsoft.com/enc/n/nexus.aspx Numerary nexus]". | In the other hand, a utonality is a collection of pitches which can be expressed in ratios that have the same numerators. For example, 7/4, 7/5, 7/6 form an utonality which 7 as numerator is called "[http://tonalsoft.com/enc/n/nexus.aspx Numerary nexus]". | ||
If a string is divided into equal parts, it will produce an utonality and so we have EDL system. EDL systems are classified as systems with unequal [http://tonalsoft.com/enc/e/epimorios.aspx epimorios]([ | If a string is divided into equal parts, it will produce an utonality and so we have EDL system. EDL systems are classified as systems with unequal [http://tonalsoft.com/enc/e/epimorios.aspx epimorios] ([https://en.wikipedia.org/wiki/Superparticular_number Superparticular]) divisions which show descending series with ascending sizes. | ||
== | ==Alternate names== | ||
In 1/1, The Journal of the Just Intonation Network, Volume 4, Number 1, Winter 1988, p.6, Michael Sloper refers to this type of scale as an "aliquot scale". | In 1/1, The Journal of the Just Intonation Network, Volume 4, Number 1, Winter 1988, p.6, Michael Sloper refers to this type of scale as an "aliquot scale". | ||
An EDL is the same as an [[IFDO]]. For example, 42-EDL is the same thing as 42ifdo. | |||
==Further Reading== | ==Further Reading== | ||
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[[Category:Edl]] | [[Category:Edl]] | ||
[[Category:Just intonation]] | [[Category:Just intonation]] | ||
[[Category:Subharmonic series]] |